/**
 * Copyright (c) 2015-2019, Golly Hu 胡高 (3722711@qq.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.hg.jfsa.manage.service;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileUtils;

import com.jfinal.aop.Inject;
import com.jfinal.kit.FileKit;
import com.jfinal.kit.StrKit;

import cn.hg.jfsa.model.JfsaDict;
import cn.hg.jfsa.web.theme.ThemeFile;
import cn.hg.jfsa.web.theme.ThemeManager;

/**
 * @author Golly
 */
public class JfsaThemeService {

	private static final String DICT_PARENT_KEY = "edit_theme_file_type";
	private List<JfsaDict> dictList;
	@Inject
	private JfsaDictService dictService;

	public String delDir (String dir, String file) {
		File f = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + dir + "/" + file);

		if (!f.exists()) {
			return "文件夹不存在！";
		}

		if (!f.isDirectory()) {
			return "目标不是文件夹！";
		}

		if (f.listFiles().length > 0) {
			return "文件夹非空，不允许删除！";
		}

		f.delete();
		return null;
	}

	public boolean delFile (String dir, String file) {
		File f = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + dir + "/" + file);

		if (f.exists()) {
			return f.delete();
		}

		return false;
	}

	public String getFileContent (String path, String file) throws IOException {
		File f = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + path + "/" + file);
		return FileUtils.readFileToString(f, "utf-8");
	}

	public String getFileEditMode (String file) {
		String mode = "ace/mode/text";

		if (this.dictList == null) {
			this.dictList = this.dictService.getByParentKey(JfsaThemeService.DICT_PARENT_KEY, "on");
		}

		for (JfsaDict dict : this.dictList) {

			if (FileKit.getFileExtension(file).equalsIgnoreCase(dict.getKey())) {
				return dict.getPara();
			}

		}

		return mode;
	}

	/**
	 * 取得当前主题某文件夹下的文件列表
	 *
	 * @param dir
	 *            某文件夹名
	 * @param parent
	 *            是否定位到上级文件夹
	 *
	 * @return 文件列表
	 */
	public List<ThemeFile> getFileList (String dir) {
		List<ThemeFile> themeFiles = new ArrayList<>();

		if (StrKit.isBlank(dir)) {
			dir = "";
		}

		File pathFile = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + dir);

		if (!pathFile.isDirectory()) {
			return themeFiles;
		}

		File[] files = pathFile.listFiles();

		for (File f : files) {

			// 依据字典中定义的可编辑文件后缀过滤文件
			if (f.isDirectory() || this.isInDict(f)) {
				ThemeFile tf = new ThemeFile();
				tf.setAbsolutePath(f.getAbsolutePath());
				tf.setDir(f.isDirectory());
				tf.setExt(FileKit.getFileExtension(f));
				tf.setName(f.getName());
				tf.setFileCount(f.isDirectory() ? f.listFiles().length : 0);
				themeFiles.add(tf);
			}

		}

		return themeFiles;
	}

	public String newDir (String dir, String file) {
		File f = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + dir + "/" + file);

		if (f.exists()) {
			return "文件夹已经存在！";
		}

		f.mkdir();
		return null;
	}

	/**
	 * 创建文件
	 *
	 * @param dir
	 * @param file
	 *
	 * @return
	 *
	 * @throws IOException
	 */
	public String newFile (String dir, String file) throws IOException {
		File f = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + dir + "/" + file);

		if (!this.isInDict(f)) {
			return "文件后缀不符合要求！";
		}

		if (f.exists()) {
			return "文件已经存在！";
		}

		f.createNewFile();
		return null;
	}

	public void updateFileContent (String dir, String file, String fileContent) throws IOException {
		File f = new File(ThemeManager.me().getCurrentTheme().getAbsolutePath() + dir + "/" + file);
		FileUtils.write(f, fileContent, "utf-8");
	}

	/**
	 * 判断文件的后缀是否存在于字典列表中
	 *
	 * @param f
	 *            文件
	 *
	 * @return true = 存在，false = 不存在
	 */
	private boolean isInDict (File f) {

		if (this.dictList == null) {
			this.dictList = this.dictService.getByParentKey(JfsaThemeService.DICT_PARENT_KEY, "on");
		}

		for (JfsaDict dict : this.dictList) {

			if (FileKit.getFileExtension(f).equalsIgnoreCase(dict.getKey())) {
				return true;
			}

		}

		return false;
	}

}
